US4213173A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polarity-and-load independent circuit arrangement for converting electrical energy
Assignee: Siemens AG
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Filing: 1978-06-02
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Granted: 1980-07-15
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Expires: 1998-06-02
Abstract
Abstract A circuit arrangement for converting electrical energy has a static frequency converter which operates with a considerably higher frequency than the frequency to be produced, the arrangement has a heavy-duty switch, a transmitter and a rectifier on the secondary side, and a master control circuit, a regulating circuit and an auxiliary static frequency converter. The heavy-duty switches on the primary side and on the secondary side are provided for the two current directions with one transformer winding of a common transformer, and are also provided with filter sections for the low frequency range and high frequency range auxiliary frequency converters. The arrangement also is provided with quadrant shift locks at the primary side and the secondary side which determine the mode of operation of the static frequency converter in conjunction with the master circuit and the regulating circuit, whereby the output flow direction can be selected or is determined by a monitoring circuit.
Inventors
- 👤 Klaus Link
- 👤 Werner Lochter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:33
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/42; H02M7/44; H02M7/48; H02M7/4807; H02M5/00; H02M5/02; H02M5/04; H02M5/22; H02M5/225; H02M7/66; H02M7/68; H02M7/72; H02M7/79; H02M7/797
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
325 words
A circuit arrangement for converting electrical energy with the air of a static-frequency converter which operates at a higher frequency than the frequency to be produced, comprising: a static frequency converter including a primary side winding means and a secondary side winding means; a plurality of rectifiers and a plurality of heavy-duty switching transistors, said rectifiers connected in series with a respective switching transistor and a respective transformer winding means and poled for a respective current direction; a primary side input connected to two of the rectifier-transistor series combinations; a secondary side output connected to another two of the rectifier-transistor series combinations; first high pass and low pass filters connected to said primary side input; second high pass and low pass filters connected to said secondary side output; and master control means connected to said transistors, to said primary side input and to said secondary side output for determining the output flow direction, said master control means including first and second regulating circuits connected to said input and output, respectively, and operable to provide regulation of the output voltage independently of the input voltage and load changes, first and second quadrant shift locks connected to said input and output, respectively, for providing output signals indicative of input and output current and voltage directions, first and second auxiliary frequency converters connected to said input and output, respectively, for deriving operating voltages for said circuit arrangement, first and second voltage monitoring circuits connected to said input and output, respectively, and to the respective regulating circuits and quadrant shift locks and operable to indicate the input and output polarities, a distributor circuit connected to said plurality of transistors and connected in circuit with said auxiliary frequency converters, said quadrant shift locks, said monitoring circuits and said regulating circuits, and operable in response to the outputs of said monitoring circuits, said regulating circuits and said quadrant shift locks to selectively operate said transistors and determine the output flow direction.
Claim 2
Dependent Claim
325 words
A circuit arrangement for converting electrical energy with the air of a static-frequency converter which operates at a higher frequency than the frequency to be produced, comprising: a static frequency converter including a primary side winding means and a secondary side winding means; a plurality of rectifiers and a plurality of heavy-duty switching transistors, said rectifiers connected in series with a respective switching transistor and a respective transformer winding means and poled for a respective current direction; a primary side input connected to two of the rectifier-transistor series combinations; a secondary side output connected to another two of the rectifier-transistor series combinations; first high pass and low pass filters connected to said primary side input; second high pass and low pass filters connected to said secondary side output; and master control means connected to said transistors, to said primary side input and to said secondary side output for determining the output flow direction, said master control means including first and second regulating circuits connected to said input and output, respectively, and operable to provide regulation of the output voltage independently of the input voltage and load changes, first and second quadrant shift locks connected to said input and output, respectively, for providing output signals indicative of input and output current and voltage directions, first and second auxiliary frequency converters connected to said input and output, respectively, for deriving operating voltages for said circuit arrangement, first and second voltage monitoring circuits connected to said input and output, respectively, and to the respective regulating circuits and quadrant shift locks and operable to indicate the input and output polarities, a distributor circuit connected to said plurality of transistors and connected in circuit with said auxiliary frequency converters, said quadrant shift locks, said monitoring circuits and said regulating circuits, and operable in response to the outputs of said monitoring circuits, said regulating circuits and said quadrant shift locks to selectively operate said transistors and determine the output flow direction.
Claim 3
Dependent Claim
21 words
The circuit arrangement of claim 1, wherein said static frequency converter includes a transformer connected to operate as a blocking transformer.
Claim 4
Dependent Claim
17 words
The circuit arrangement of claim 2 wherein said transformer includes serially-connected primary windings and serially-connected secondary windings.
Claim 5
Dependent Claim
16 words
The circuit arrangement of claim 1, wherein said static frequency converter comprises a one-phase flow-through transformer.
Claim 6
Dependent Claim
16 words
The circuit arrangement of claim 1, wherein said static frequency converter comprises a push-pull flow-through transformer.
Claim 7
Dependent Claim
46 words
The circuit arrangement of claim 1, wherein said regulating circuits each comprise a pulse width modulator connected to the respective auxiliary frequency converter and to the respective input and output and to the respective monitoring circuit, and a pulse generator connected to said pulse width modulator.
Claim 8
Dependent Claim
90 words
The circuit arrangement of claim 6, wherein each of said regulator circuits also comprises a reference signal generator, and a reference-actual value comparator connected to said reference signal generator, to said monitoring circuit and to said pulse width modulator, and wherein said distributor circuit comprises gate means connected to and operated by said pulse width modulators and said quadrant shift locks, and drivers connected between said gate means and said heavy-duty switching transistors, and wherein said input and said output each comprise an integrating element connected to the respective comparator.
Claim 9
Dependent Claim
26 words
The circuit arrangement of claim 7, wherein said reference signal generator produces a D.C. reference signal for D.C. voltages applied to said comparator from said input.
Claim 10
Dependent Claim
26 words
The circuit arrangement of claim 7, wherein said reference signal generator produces an A.C. reference signal for A.C. voltages applied to said comparator from said input.
Claim 11
Dependent Claim
53 words
The circuit arrangement of claim 7, wherein said pulse generator operates at a higher frequency than the frequency to be produced and wherein said pulse width modulator includes means actuated by said pulse generator to derive pulse width modulated rectangular signals and inversions of such signals from the output signal of said comparator.
Claim 12
Dependent Claim
33 words
The circuit arrangement of claim 1, wherein each of said quadrant shift locks comprises direction-sensitive amplifiers for detecting the respective voltage and current directions and producing quadrant indicative signals to said distributor circuit.
Claim 13
Dependent Claim
38 words
The circuit arrangement of claim 11, wherein said distributor circuit comprises gating means connected to said quadrant shift locks and to said regulating circuits for the correct assignment of regulation signals and quadrant signals to said switching transistors.
Claim 14
Dependent Claim
21 words
The circuit arrangement of claim 1, wherein said distributor circuit comprises driver circuits connected to provide switching signals to said transistors.
Claim 15
Dependent Claim
29 words
The circuit arrangement of claim 1, wherein said master control means comprises: a pulse generator connected in circuit with said distributor circuit for causing synchronous switching of said transistors.
Claim 16
Dependent Claim
30 words
The circuit arrangement of claim 1, comprising: a plurality of protective devices, each connected to a respective heavy-duty switching transistor to protect the same from excessive surge voltages and currents.
Claim 17
Dependent Claim
16 words
The circuit arrangement of claim 1, wherein said static converter is constituted by a two-winding choke.
Claim 18
Dependent Claim
30 words
The circuit arrangement of claim 1, comprising: a first current limiting device connected to said primary side input; and a second current limiting device connected to said secondary side output.
Claim 19
Dependent Claim
35 words
The circuit arrangement of claim 1, comprising: an emergency power supply connected to said secondary side output; and means for feeding back said emergency power supply to said input to power all circuits connected thereto.
Claim 20
Dependent Claim
29 words
The circuit arrangement of claim 18, comprising: a rectifier arrangement connected to said primary side input for isolating said emergency power supply and said input from a feeding network.
Claim 21
Dependent Claim
22 words
The circuit arrangement of claim 18, comprising: decoupling means for decoupling said emergency power supply and said input from a feeding network.
Claim 22
Dependent Claim
13 words
The circuit arrangement of claim 20, wherein: said decoupling means includes switch contacts.
Claim 23
Dependent Claim
13 words
The circuit arrangement of claim 20, wherein: said decoupling means includes semiconductor switches.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-07-15 | 1984-01-14 | 1984-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-07-15 | 1988-01-14 | 1988-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-07-15 | 1992-01-14 | 1992-07-15 | $7700.00 | Window Closed / Lapsed |